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海皮杰克矿的大型铀矿床产于三迭纪的琴尔建造(Chinle formation)中的辛钠隆普(Shinarump)段中,该段岩层充填在切入下伏地层——三迭纪摩恩科比建造(Moenkopi formation)的古河道中。根据矿物学特征已将该矿床划分为硫化物带,过渡带和氧化带。在所有各带中都可鑑定出下列三种类型的矿石:木质“碎屑”的交代产物,较大木质碎块的交代产物和层状矿石。硫化物带的矿石由晶质铀矿和伴生的黄铁矿、黄铜矿、闪锌矿、斑铜矿、方铅矿等组成。这些原生硫化物矿石看来赋存在含较多碳化植物残体和粉砂质的透水性较好的岩层中。铀和铜提供了在硫化物带和过渡带内部有次生富集作用的证据。过渡带的矿石含有晶质铀矿和硫化矿物的残余,和大量的针铁矿及黄钾铁矾。氧化带的矿石以含铁的氧化物为主,并且不含硫化矿物。有些铀、铜和铁在风化作用中保存下来,但是大部分锰、锌和铅在氧化作用中被带走了。
The large uranium deposit at the Hippie Jack mine is found in the Shinarump section of the Triassic Chinle formation that fills in the underlying strata - the Triassic Moench Bryant In the ancient channel of the Moenkopi formation. According to mineralogical characteristics, the deposit has been divided into sulphide, transition and oxidation zones. The following three types of ores can be identified in all belts: the replacement product of wood “clasts”, the replacement product of larger wood fragments, and stratiform ores. Sulfide ore from the crystalline uranium and associated pyrite, chalcopyrite, sphalerite, bornite, galena and other components. These primary sulphide minerals appear to be present in more permeable formations with more carbonized plant debris and silt. Uranium and copper provide evidence of secondary enrichment within sulphide and transition zones. The transitional zone contains remnants of crystalline uranium and sulfide minerals, as well as large amounts of goethite and jarosite. Oxygenated ores are mainly iron-containing oxides and do not contain sulfide minerals. Some uranium, copper and iron are preserved during weathering, but most manganese, zinc and lead are taken away by oxidation.